Please note: In Swedish, this is said in the present tense and with no preposition. For example: Swedish: "Jag är född 1990" = English: "I was born in 1990".
Edit: also note that if someone is no longer alive, we use var instead.
Carl von Linné var född 1707.
Felix Kjellberg är född 1989.
Intriguing! I am learning a Native Californian language. They are using the phrase "where we are born." I'm not sure if that's because there are so few language speakers nobody would know the past tense, or whether there's something else going on. Now, I REALLY want to know!
I can only picture "When were you born?", "when will you be born?", and "when are you going to be born?". I can not picture it ever being correct to say "when are you born?"... Unless maybe if it were a recurring event: "I am (re)born every year". It is stretching the English a bit far. I think you might use "birthed" or something there, instead.